#!/usr/bin/env bash

set -eu

function usage {
    echo "NOTE: This script is deprecated."
    echo "Usage: $0 [OPTION]..."
    echo "Run Neutron's test suite(s)"
    echo ""
    echo "  -V, --virtual-env           Always use virtualenv.  Install automatically if not present"
    echo "  -N, --no-virtual-env        Don't use virtualenv.  Run tests in local environment"
    echo "  -s, --no-site-packages      Isolate the virtualenv from the global Python environment"
    echo "  -r, --recreate-db           Recreate the test database (deprecated, as this is now the default)."
    echo "  -n, --no-recreate-db        Don't recreate the test database."
    echo "  -f, --force                 Force a clean re-build of the virtual environment. Useful when dependencies have been added."
    echo "  -u, --update                Update the virtual environment with any newer package versions"
    echo "  -p, --pep8                  Just run PEP8 and HACKING compliance check"
    echo "  -8, --pep8-only-changed [<basecommit>]"
    echo "                              Just run PEP8 and HACKING compliance check on files changed since HEAD~1 (or <basecommit>)"
    echo "  -P, --no-pep8               Don't run static code checks"
    echo "  -c, --coverage              Generate coverage report"
    echo "  -d, --debug                 Run tests with testtools instead of testr. This allows you to use the debugger."
    echo "  -h, --help                  Print this usage message"
    echo "  --virtual-env-path <path>   Location of the virtualenv directory"
    echo "                               Default: \$(pwd)"
    echo "  --virtual-env-name <name>   Name of the virtualenv directory"
    echo "                               Default: .venv"
    echo "  --tools-path <dir>          Location of the tools directory"
    echo "                               Default: \$(pwd)"
    echo ""
    echo "Note: with no options specified, the script will try to run the tests in a virtual environment,"
    echo "      If no virtualenv is found, the script will ask if you would like to create one.  If you "
    echo "      prefer to run tests NOT in a virtual environment, simply pass the -N option."
    exit
}

function process_options {
    i=1
    while [ $i -le $# ]; do
    case "${!i}" in
        -h|--help) usage;;
        -V|--virtual-env) always_venv=1; never_venv=0;;
        -N|--no-virtual-env) always_venv=0; never_venv=1;;
        -s|--no-site-packages) no_site_packages=1;;
        -r|--recreate-db) recreate_db=1;;
        -n|--no-recreate-db) recreate_db=0;;
        -f|--force) force=1;;
        -u|--update) update=1;;
        -p|--pep8) just_pep8=1;;
        -8|--pep8-only-changed) just_pep8_changed=1;;
        -P|--no-pep8) no_pep8=1;;
        -c|--coverage) coverage=1;;
        -d|--debug) debug=1;;
        --virtual-env-path)
        $(( i++ ))
        venv_path=${!i}
        ;;
        --virtual-env-name)
        $(( i++ ))
        venv_dir=${!i}
        ;;
        --tools-path)
        $(( i++ ))
        tools_path=${!i}
        ;;
        -*) testopts="$testopts ${!i}";;
        *) testargs="$testargs ${!i}"
    esac
    $(( i++ ))
    done
}

tool_path=${tools_path:-$(pwd)}
venv_path=${venv_path:-$(pwd)}
venv_dir=${venv_name:-.venv}
with_venv=tools/with_venv.sh
always_venv=0
never_venv=0
force=0
no_site_packages=0
installvenvopts=
testargs=
testopts=
wrapper=""
just_pep8=0
just_pep8_changed=0
no_pep8=0
coverage=0
debug=0
recreate_db=1
update=0

LANG=en_US.UTF-8
LANGUAGE=en_US:en
LC_ALL=C

process_options $@

echo "NOTE: this script (run_tests.sh) is deprecated and will be removed in the Pike release."
echo ""

# Make our paths available to other scripts we call
export venv_path
export venv_dir
export venv_name
export tools_dir
export venv=${venv_path}/${venv_dir}

if [ $no_site_packages -eq 1 ]; then
    installvenvopts="--no-site-packages"
fi


function run_tests {
    # Cleanup *pyc
    ${wrapper} find . -type f -name "*.pyc" -delete

    if [ $debug -eq 1 ]; then
        if [ "$testopts" = "" ] && [ "$testargs" = "" ]; then
            # Default to running all tests if specific test is not
            # provided.
            testargs="discover ./neutron/tests"
        fi
        ${wrapper} python -m testtools.run $testopts $testargs

        # Short circuit because all of the testr and coverage stuff
        # below does not make sense when running testtools.run for
        # debugging purposes.
        return $?
    fi

    if [ $coverage -eq 1 ]; then
        TESTRTESTS="$TESTRTESTS --coverage"
    else
        TESTRTESTS="$TESTRTESTS --slowest"
    fi

    # Just run the test suites in current environment
    set +e
    testargs=`echo "$testargs" | sed -e's/^\s*\(.*\)\s*$/\1/'`
    TESTRTESTS="$TESTRTESTS --testr-args='--subunit $testopts $testargs'"
    OS_TEST_PATH=`echo $testargs|grep -o 'neutron\.tests[^[:space:]:]\+'|tr . /`
    if [ -n "$OS_TEST_PATH" ]; then
        os_test_dir=$(dirname "$OS_TEST_PATH")
    else
        os_test_dir=''
    fi
    if [ -d "$OS_TEST_PATH" ]; then
        wrapper="OS_TEST_PATH=$OS_TEST_PATH $wrapper"
    elif [ -d "$os_test_dir" ]; then
        wrapper="OS_TEST_PATH=$os_test_dir $wrapper"
    fi
    echo "Running \`${wrapper} $TESTRTESTS\`"
    bash -c "${wrapper} $TESTRTESTS | ${wrapper} subunit2pyunit"
    RESULT=$?
    set -e

    copy_subunit_log

    if [ $coverage -eq 1 ]; then
        echo "Generating coverage report in covhtml/"
        # Don't compute coverage for common code, which is tested elsewhere
        ${wrapper} coverage combine
        ${wrapper} coverage html --include='neutron/*' -d covhtml -i
    fi

    return $RESULT
}

function copy_subunit_log {
    LOGNAME=`cat .testrepository/next-stream`
    LOGNAME=$(($LOGNAME - 1))
    LOGNAME=".testrepository/${LOGNAME}"
    cp $LOGNAME subunit.log
}

function warn_on_flake8_without_venv {
    if [ $never_venv -eq 1 ]; then
        echo "**WARNING**:"
        echo "Running flake8 without virtual env may miss OpenStack HACKING detection"
    fi
}

function run_pep8 {
    echo "Running flake8 ..."
    warn_on_flake8_without_venv
    ${wrapper} flake8
}

function run_pep8_changed {
    # NOTE(gilliard) We want use flake8 to check the entirety of every file that has
    # a change in it. Unfortunately the --filenames argument to flake8 only accepts
    # file *names* and there are no files named (eg) "nova/compute/manager.py".  The
    # --diff argument behaves surprisingly as well, because although you feed it a
    # diff, it actually checks the file on disk anyway.
    local target=${testargs:-HEAD~1}
    files=$(git diff --name-only $target | tr '\n' ' ')
    echo "Running flake8 on ${files}"
    warn_on_flake8_without_venv
    diff -u --from-file /dev/null ${files} | ${wrapper} flake8 --diff
}


TESTRTESTS="python setup.py testr"

if [ $never_venv -eq 0 ]; then
    # Remove the virtual environment if --force used
    if [ $force -eq 1 ]; then
        echo "Cleaning virtualenv..."
        rm -rf ${venv}
    fi
    if [ $update -eq 1 ]; then
        echo "Updating virtualenv..."
        python tools/install_venv.py $installvenvopts
    fi
    if [ -e ${venv} ]; then
        wrapper="${with_venv}"
    else
        if [ $always_venv -eq 1 ]; then
            # Automatically install the virtualenv
            python tools/install_venv.py $installvenvopts
            wrapper="${with_venv}"
        else
            echo -e "No virtual environment found...create one? (Y/n) \c"
            read use_ve
            if [ "x$use_ve" = "xY" -o "x$use_ve" = "x" -o "x$use_ve" = "xy" ]; then
                # Install the virtualenv and run the test suite in it
                python tools/install_venv.py $installvenvopts
                wrapper=${with_venv}
            fi
        fi
    fi
fi

# Delete old coverage data from previous runs
if [ $coverage -eq 1 ]; then
    ${wrapper} coverage erase
fi

if [ $just_pep8 -eq 1 ]; then
    run_pep8
    exit
fi

if [ $just_pep8_changed -eq 1 ]; then
    run_pep8_changed
    exit
fi

if [ $recreate_db -eq 1 ]; then
    rm -f tests.sqlite
fi

run_tests

# NOTE(sirp): we only want to run pep8 when we're running the full-test suite,
# not when we're running tests individually. To handle this, we need to
# distinguish between options (testopts), which begin with a '-', and
# arguments (testargs).
if [ -z "$testargs" ]; then
    if [ $no_pep8 -eq 0 ]; then
        run_pep8
    fi
fi
